2nπ±π82 n \pi \pm \frac{\pi}{8}2nπ±8π
nπ±π6\mathrm{n} \pi \pm \frac{\pi}{6}nπ±6π
n±π6n \pm \frac{\pi}{6}n±6π
2nπ±π62 n \pi \pm \frac{\pi}{6}2nπ±6π